Mounting for mercury switches



- Aug. 12, 1930. E. w. MENKE IOUD ITING FOR MERCURY SWITCHES Filed March so, 1929 m n m 3 Edward 14 menlre mm km m OM .fiaw f a W a m 7 lll v na m m an E Patented Aug". 12. 1930 STATES PATENT OFFICE EDWARD W. MENKE, OI CHICAGO, ILLINOIS, ASSIGNOR TO .SZl.- REGIS'PAIEB comm,

:OENEW YORK,N.*Y., .A- CORPORATION OF NEW YORK MOUNTING 1'08 'MEBCURY SWITCHES Application n1ea'mrcnso,:192s. Serial No. 351-,183.

This invention relates to a mountingifor a mercuryswitch' and has as its object to pro? vide a mounting whereby the switch may be operated by a slight movement of an operating member, and the parts can be accurately adjusted so'that the switch isproperly related-to its tripping member. Details of'the invention will appear as the descriptionproceeds.

' 19 In the accompanying drawings illustrating tion in Fig. 1, with the'housing'cap removed,

as'indlcated'by'line 2 2 on Fig. 1; Figs. '3, 4 and 5rare sections on lines 33, and

as 5- 5,respectively on Fig. 2.

The :"switch and its mounting are shown arranged to be'attaehed to a filling and-weighing device or similar apparatus, :and to be trippedby'a movement of the weighing deas 'vice. v

' A housing isprovided with a cover 11 for covering the switch'an'dits mounting. 'Within this housing there is a bracket 12 havin'garms 13- and1 4 pivoted to thehousing on 30 screw pivots 15 andlfi. The bracket is provided with .a tail-piece 17 through which there is a hole 18. A'bolt 19 mounted in the housing extends throughhole 1'8. Surrounding bolt 19 there-is a spring 20 resting upon the housing and supporting the bracket. A screw 21 mounted in the top of the-housing acts as anadjustable stop limiting the upward movement of the bracket. A lock-nut "22 is provided for locking the adjusting screw 10 in position.

A carrier 23 is-mounted upon the upper side of bracket'12andis provided-with a-slot 24 throughwhich there passes a set screw 25, so that the carrier may be fastened in adjusted position on the bracket. 7

The carrier is provided 'with forwardly projecting cars 26. A clamp 27 is provided With-a pivot pin 28, the ends of which are mounted in pivot cups29 screwed through cars 26. A mercury switch 30 is held in position on clamp27 'by clips 31. Clamp 27 is provided with an arm 32 having its end split. A screw 33 is adjustable through the split end of arm 32and rests on'the bracket and supports-the end'of the arm so as to normall maintaintheswitch at the desired angle. X clamp screw 34 maybe provided for-tightening the split end of arm 32 on screw 33 so as to hold it firmly in adjusted position.

Ontheaunderside of clamp 27 at .a'point w closely. adjacent tothe; pivot rod 28, there is .Ifastened a wear plate-35 in position to be contacted bya-trip pin '36 mounted upon a member 37 which may be attached to aweighing-device. Member 37 may be extended, if as desire'drbetween stop screws 38'to'limit the movement-of this member.

It" will: be readily understood that leads 39 from an electric clrcuit are' connected to the mer'cury switch, so that the mercury closes the circuit through these leads when the switchis in normalposition; but the circuit is broken when the switch is tilted bythe rising of trip rod 36.

In the use of the device suggested, where '75 it is employed in a filling and weighing machine, the'circuit through the switch may control the operation of the feeding means,

an d'the trip rod may be mounted in connection withthe'weighingmeans sothat'when so the desired amount of material has been fed into'a receptacle, the resultant movement of the weighing device'raises rod-36 and tilts the-mercury switch so as to open'the circuit.

"The-opening of the'circ'uit may result in stop-- as "ping a motor drivingoa-feediug device, or in closings. ate, or in h.

It will e readily seen that the mounting of the mercu switch as described makes it possible 'to ad ust it so astoobtain the pre-- cise action desired. The height of pivot pin 28 may be adjusted by screw 21, as spring 20 1 raises the bracket and-pivot points carried thereby to whatever height is allowed by screw-21. The distance from the axial line of'pivots 28 to thepoint of rod 36 can be controlled by adjusting carrier 23 on bracket 12 by means of slot 24 and screw 25. The angle atwhich the mercury switch normally rests-is're'adily controlled by adjustment of 1 -SW1tCl1 normally restsvyl screw 33. The parts are so related that the switch and clamp return to the switch-closing position by gravity when permitted to do so by the lowering of rod 36.

While one specific embodiment of the 1nvention has been described in, considerable v detail, itwill b'ireadily understood that van:

be made Within the scope ous changes ma of the appende claims. Wha't-Iclaim-is:

signed 1. In combination, acar'i'il nbunaadio'r I adjustment vertically and for ndependent, adjustment horizontally, a mercurysw'itch pivoted on the carrier, and means in the angle to the carrier at which the for adjust- I .2. In combinati'oma carrier mounted for 1 adjustmentvertically and for independent adjustment horizontally, a clamplng member clamped on said'clamping member, and ad- 'justable means for limiting-the oscillation vofsaidmemberm pivoted ron said carrier, a mercury switch 3. In combinationyitcarrier, a'clamping member pivoted-"on thecarrier, axmercuryswitch clamped .on sa-1d clamping member, a

lug on.o'ne side of said member and a's'et screw adjustably limiting the-movement of said lug. v v.

.4.'.In combination, a carrier, a-clampm'g; member pivoted on the carrier, a mercury switch clamped on said-clamping member, a

wear plate on the underside of said member adjacent to one side of itspivot, an operating pin adapted tozcontact'said plate and I tilt said member in oneudirectiomand' a lug projecting from said member and carrying a :set screw adaptedto limit the tilting- 0f said member in the other direction;

5. In combination, a bracket, resilient means tending to raise said bracket, an adi justable stop limiting the raising of said bracket, a mercury switch mounted on said bracket, and a vertically movable member adaptedto operate said switch.

6. .In combination, a: bracket, resilient means tendingto-raise said bracket, an adjustable stop limiting the raising of said bracket, acarrier mounted on said bracket and adjustable horizontally thereon, a member pivoted on said carrier. a mercury switch carried by said member, and a vertically movable 0 crating pin adapted to tilt said switch.

7; n combination, a bracket mounted pivotally .at one end and resting upon a spring at the other end, an adjustable stop limiting the distance to which said spring can'raise the bracket, a carrier-adjustable longitudinal- 1y of said bracket,a member pivoted to said earner, a mercury switch mounted on said member; a wear plateon said member adjacent the .arris thereof, a vertically movable operating pin adapted to contact said wear plate, the center of gravity of saidmembe'r and parts carried thereby tending tomain- 

